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7 Troubleshooting<br />
7 Troubleshooting<br />
<br />
General Fault and Alarms<br />
Faults and alarms indicate problems in the drive or in the machine.<br />
An alarm is indicated by a code on the data display and the flashing ALM LED. The drive output is not necessarily switched off.<br />
A fault is indicated by a code on the data display and the ALM LED is on. The drive output is always switched off immediately and the motor coast<br />
to stop.<br />
To remove an alarm or reset a fault, trace the cause, remove it and reset the drive by pushing the Reset key on the operator or cycling the power<br />
supply.<br />
This lists up the most important alarms and faults only. Please refer to the Technical Manual for a complete list.<br />
LED Display ALM FLT Cause Corrective Action<br />
Base Block<br />
The software base block function is assigned to one of the digital inputs and • Check the digital inputs function selection.<br />
<br />
the input is off. The drive does not accept Run commands.<br />
• Check the upper controller sequence.<br />
Control Fault<br />
Control Circuit Fault<br />
to<br />
Control Circuit Fault<br />
Cannot Reset<br />
<br />
<br />
<br />
The torque limit was reached during deceleration for longer than 3 sec.<br />
when in Open Loop Vector control<br />
• The load inertia is too big.<br />
• The torque limit is too low.<br />
• The motor parameters are wrong.<br />
There is a problem in the drive’s control circuit.<br />
There is no terminal board connected to the control board or the connection<br />
is broken.<br />
• Check the load.<br />
• Set the torque limit to the most appropriate setting (L7-01 through L7-<br />
04).<br />
• Check the motor parameters.<br />
• Cycle the drive power supply.<br />
• Initialize the drive.<br />
• Replace the drive if the fault occurs again.<br />
• Check if the terminal board is installed properly.<br />
• Uninstall and Reapply the terminal board.<br />
• Change the drive.<br />
Fault reset was input when a Run command was active. Turn off the Run command and reset the drive.<br />
Option External Fault<br />
External Fault<br />
External Faults<br />
to<br />
Internal Fan Alarm<br />
Ground Fault<br />
<strong>Drive</strong> Disable<br />
<strong>Drive</strong> Disable Fault<br />
Output Phase Loss<br />
Overcurrent<br />
Heatsink Overheat<br />
or<br />
Motor Overload<br />
<strong>Drive</strong> Overload<br />
DC Overvoltage<br />
An external fault was tripped by the upper controller via an option card.<br />
<br />
<br />
<br />
A forward and reverse command were input simultaneously for longer than<br />
500 ms. This alarm stops a running motor.<br />
• An external fault was triggered by an external device via one of the<br />
digital inputs S1 to S6.<br />
• The digital inputs are set up incorrectly.<br />
• Internal stirring fan does not work<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
Ground leakage current has exceeded 50% of the drives rated output<br />
current.<br />
• Cable or motor insulation is broken.<br />
• Excessive stray capacitance at drive output.<br />
Both <strong>Drive</strong> Disable inputs are open. The drive output is safely disabled and<br />
the motor can not be started.<br />
<strong>Drive</strong> output is disabled while only one of the <strong>Drive</strong> Disable inputs is open.<br />
(normally both input signals H1 and H2 should be open)<br />
• One channel is internally broken and does not switch off, even if the<br />
external signal is removed.<br />
• Only one channel is switched off by the upper controller.<br />
• Output cable is disconnected or the motor winding is damaged.<br />
• Loose wires at the drive output.<br />
• Motor is too small (less than 5% of drive current).<br />
• Short circuit or ground fault on the drive output side<br />
• The load is too heavy.<br />
• The accel./decel. times are too short.<br />
• Wrong motor data or V/f pattern settings.<br />
• A magnetic contactor was switched at the output.<br />
• Surrounding temperature is too high.<br />
• The cooling fan has stopped. <br />
• The heatsink is dirty.<br />
• The airflow to the heatsink is restricted.<br />
• The motor load is too heavy.<br />
• The motor is operated at low speed with heavy load.<br />
• Cycle times of accel./ decel. are too short.<br />
• Incorrect motor rated current has been set.<br />
• The load is too heavy.<br />
• The drive capacity is too small.<br />
• Too much torque at low speed.<br />
DC bus voltage rose too high.<br />
• The deceleration time is too short.<br />
• Stall prevention is disabled.<br />
• Braking chopper / resistor broken.<br />
• Unstable motor control in OLV.<br />
• Too high input voltage.<br />
• Remove the fault cause, reset the fault and restart the drive.<br />
• Check the upper controller program.<br />
Check the sequence and make sure that the forward and reverse input are<br />
not set at the same time.<br />
• Find out why the device tripped the EF. Remove the cause and reset the<br />
fault.<br />
• Check the functions assigned to the digital inputs.<br />
• Replace internal fan (see fig. Replacing the Internal Stirring Fan on<br />
page 27)<br />
• Check the output wiring and the motor for short circuits or broken<br />
insulation. Replace any broken parts.<br />
• Reduce the carrier frequency.<br />
• Check why the upper controller’s safety device disabled the drive.<br />
Remove the cause and restart.<br />
• Check the wiring. If the <strong>Drive</strong> Disable function is not utilized for<br />
EN60204-1, stop cat. 0 or for disabling the drive, the terminals HC, H1,<br />
H2 must be linked.<br />
• Check the wiring from the upper controller and make sure that both<br />
signals are set correctly by the controller.<br />
• If the signals are set correctly and the alarm does not disappear, replace<br />
the drive.<br />
• Check the motor wiring.<br />
• Make sure all terminal screws in the drive and motor are properly<br />
tightened.<br />
• Check the motor and drive capacity.<br />
• Check the output wiring and the motor for short circuits or broken<br />
insulation. Replace the broken parts.<br />
• Check the machine for damages (gears, etc.) and repair any broken parts.<br />
• Check the drive parameter settings.<br />
• Check the output contactor sequence.<br />
• Check the surrounding temperature and install cooling devices if<br />
necessary.<br />
• Check the drive cooling fan.<br />
• Clean the heatsink.<br />
• Check the airflow around the heatsink.<br />
• Reduce the motor load.<br />
• Use a motor with external cooling and set the correct motor in parameter<br />
L1-01<br />
• Check the sequence.<br />
• Check the rated current setting.<br />
• Check the load.<br />
• Make sure that the drive is big enough to handle the load.<br />
• The overload capability is reduced at low speeds. Reduce the load or<br />
increase the drive size.<br />
• Increase the deceleration time.<br />
• Enable stall prevention by parameter L3-04.<br />
• Make sure the braking resistor and braking chopper are working<br />
correctly.<br />
• Check motor parameter settings and adjust torque and slip compensation,<br />
AFR and hunting prevention as needed.<br />
• Make sure that the power supply voltage meets the drives specifications.<br />
EN 24<br />
<strong>YASKAWA</strong> Europe TOMP_C710606_75A <strong>V1000</strong> <strong>IP66</strong> - Quick Start Guide